<html><body bgcolor="#FFFFFF"><div>This means we could not match the cancel to a current call dialog. I would need to see the full sip trace of the call to know why, but typically this is because of not matching call Id or to or from tags</div><div><br></div><div>Mike<br><br>On Mar 24, 2009, at 9:43 AM, Steven Ward <<a href="mailto:steve.d.ward@gmail.com">steve.d.ward@gmail.com</a>> wrote:<br><br></div><div></div><blockquote type="cite"><div><div>A CANCEL request sent from my Asterisk UA (10.1.21.44) to FS (b-lab-1) while the call is still ringing does not work.</div>
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<div>Why is this request resulting in a 481?</div>
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<div>I appreciate the help - I'm still just starting to learn SIP & FS. The CANCEL request and 481 response appear as follows on my FS console:</div>
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<div>recv 362 bytes from udp/[10.1.21.44]:5060 at 13:30:23.291616:<br> ------------------------------------------------------------------------<br> CANCEL <a href="mailto:sip%3A70904@b-pbx-lab-1.mynet.net">sip:<a href="mailto:70904@b-pbx-lab-1.mynet.net">70904@b-pbx-lab-1.mynet.net</a></a> SIP/2.0<br>
Via: SIP/2.0/UDP 10.1.21.44:5060;branch=z9hG4bK6f7f35ab;rport<br> From: "Steve" <<a href="mailto:sip%3A70904@10.1.21.44">sip:<a href="mailto:70904@10.1.21.44">70904@10.1.21.44</a></a>>;tag=as7f6965ea<br> To: <<a href="mailto:sip%3A70904@b-lab-1.mynet.net">sip:<a href="mailto:70904@b-lab-1.mynet.net">70904@b-lab-1.mynet.net</a></a>><br>
Call-ID: <a href="mailto:237598fd102b739a03b4a4047bf69843@10.1.21.44"><a href="mailto:237598fd102b739a03b4a4047bf69843@10.1.21.44">237598fd102b739a03b4a4047bf69843@10.1.21.44</a></a><br> CSeq: 103 CANCEL<br> User-Agent: Asterisk PBX<br> Max-Forwards: 70<br> Content-Length: 0</div>
<p> ------------------------------------------------------------------------<br>send 327 bytes to udp/[10.1.21.44]:5060 at 13:30:23.292235:<br> ------------------------------------------------------------------------<br>
SIP/2.0 481 Call/Transaction Does Not Exist<br> Via: SIP/2.0/UDP 10.1.21.44:5060;branch=z9hG4bK6f7f35ab;rport=5060<br> From: "Steve" <<a href="mailto:sip%3A70904@10.1.21.44">sip:<a href="mailto:70904@10.1.21.44">70904@10.1.21.44</a></a>>;tag=as7f6965ea<br>
To: <<a href="mailto:sip%3A70904@b-lab-1.mynet.net">sip:<a href="mailto:70904@b-lab-1.mynet.net">70904@b-lab-1.mynet.net</a></a>>;tag=71m745HKHKyjc<br> Call-ID: <a href="mailto:237598fd102b739a03b4a4047bf69843@10.1.21.44"><a href="mailto:237598fd102b739a03b4a4047bf69843@10.1.21.44">237598fd102b739a03b4a4047bf69843@10.1.21.44</a></a><br>
CSeq: 103 CANCEL<br> Content-Length: 0</p>
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<div>Thanks. - SW</div>
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